It depends on how old your receipt is.  Anything older than 2 months will not be reimbursed.  This is to properly control the matching of expenses to the period it was incurred.

Your reimbursement attachment should be an official BIR document like official receipts or invoices and collection receipts.  Make sure that the official receipt (O.R.) is made out to De La Salle-College of Saint Benilde (DLS-CSB).